Small source

[pyrogx2000]

I am working with a music video with 117 megs as the source size.
In DVD2AVI it shows up as 29.97 FPS NTSC
It looks interlaced but I dont use forced film, and use IVTC.
The interlacing is gone, however the video looks kinda jumpy, like it is losing (dropping?) frames. Since dvd2avi said it was 29.97 NTSC I figured I should use 29.97 in gordian knot.
My questions are: Is my output filesize (put in by me) causing jumpiness because of bitrate? Or is my framerate all wrong?

I have tried all of the framerate/forced film combinations so far, and im thinking that it might be the quality of the rip from the dvd because it seems to drop the frames in exactly the same places in the video. Im new to this so please excuse me if it sounds confusing ;)

[hakko504]

Sound like you have an interlaced source. Have you tried a simple script like:mpeg2source(music.d2v)
separatefields() or mpeg2source(music.d2v)
bob()and stepped through the video to see what kind of pattern you really have? If people are moving all the time then it's almost certainly an interlaced source, which should be deinterlaced in GK and thus left at 29.97 fps.

[scharfis_brain]

It is IMO very common, that NTSC-musicvids are hybrid (film(23,976 fps) and video(29,97 / 59,94 fps)

so there would be no really uncomplicated way to make a non-jerky AVI of this...

[pyrogx2000]

I will try the 'seperatefields' and 'bob' when I get home, thank you :)

[pyrogx2000]

Maybe I wasnt previewing the video for long enough but it just said NTSC for the whole time I was previewing which was for a while but not the whole video. If it was a combination of stuff, wouldnt I have seen it in the info box?

[pyrogx2000]

Here comes the part where i'm gonna be told to rtfm, but I've done it this way for a while and i've gotten the results I want. When I put the 29.97 that the source is, as my output: I see in the encoding log that the frame count is all wrong and it automatically changes the 29.97 to something else. I know that force film does nothing for fixing the interlacing on this video. This is why I keep it at 29.97. If I dont ivtc or try to fix it at all, its still jumpy. I think I'm picking the wrong framerate, but i've tried them all already so this is where im wondering whats up with it ( me ;) )

[scharfis_brain]

could you provide a sample?
maybe its is a crappy PAL to NTSC conversion ?

[pyrogx2000]

Like a sample picture? I gotta wait till I get home later :)

[scharfis_brain]

a sample picture wouldn't help.

I need a UNTOUCHED (maybe interlaced mpeg-2 compression) sample VIDEO (2 seconds) of that video

[pyrogx2000]

So you want a small slice of the vob file?

[pyrogx2000]

btw sorry i didnt post this in the newb forum :/ maybe it'll be moved

[jggimi]

Perhaps you missed http://forum.doom9.org/showthread.php?s=&threadid=34696. It's a sticky pointing to a tutorial on IVTC; and has suggestions for determining how to analyze the source to see if IVTC would be helpful or not. If you've not read the tutorial that could account for your apparent confusion, though it "sounds" to me from your description that you have an interlaced source from a video camera. IVTC or Force FILM only apply to material that has been Telecined.

[pyrogx2000]

So when I apply IVTC to something that doesnt need it, I'm getting jumpyness? (Dropped frames?)

[jggimi]

Yes.

[pyrogx2000]

Ok, all I did was put in

bob()

and it is never jumpy anymore! :D

Although you can make out some lines, its not interlaced. It looks good enough for me to call it finished but im sure I could make it better. Got any other tricks to put in an .avs file that might look good? (NO IVTC!) :D

[scharfis_brain]

are there any blended frames (ghosting) visible after a bob()?

[pyrogx2000]

I just noticed also, this whole dvd is a concert dvd and its a promo video i was working with. It isnt the final video :/ . In that tutorial i saw that these kind of dvd's dont use FILM alot.

You can see a little bit of lines that move with the people moving but its not interlaced, and isnt that noticable. It doesnt look as great as the other encodes of videos i've done, and wasn't nearly as easy to do. All the others were just forced film, and that was it :)